Derivatives (Summary of Types of Derivatives, Separately by Assets and Liabilities and Fair Value of Derivatives) (Details) (USD $) In Thousands	Jun. 30, 2011	Dec. 31, 2010
Total asset derivatives	$ 1,979	$ 1,060
Total liability derivatives	1,518	361
Interest Rate Contracts [Member] | Rate Lock Commitments [Member] | Other Assets [Member]
Total asset derivatives	319	306
Interest Rate Contracts [Member] | Rate Lock Commitments [Member] | Other Liabilities [Member]
Total liability derivatives	91	170
Interest Rate Contracts [Member] | Forward Sales Commitments [Member] | Other Assets [Member]
Total asset derivatives	272	754
Interest Rate Contracts [Member] | Forward Sales Commitments [Member] | Other Liabilities [Member]
Total liability derivatives	124	191
Interest Rate Swap [Member] | Other Assets [Member]
Total asset derivatives	1,388
Interest Rate Swap [Member] | Other Liabilities [Member]
Total liability derivatives	$ 1,303